scholarly journals X-ray data for the substitutional solid solution of the binary system ammonium dihydrogen phosphate with boric acid

1994 ◽  
Vol 17 (3) ◽  
pp. 205-207 ◽  
Author(s):  
M. L. N. Madhu Mohan ◽  
C. Haranadh
Keyword(s):  
Solid Solution ◽  
Binary System ◽  
Boric Acid ◽  
Substitutional Solid Solution ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
X Ray

Growth and Characterization of Ammonium Dihydrogen Phosphate (ADP) Doped with H3BO3 Crystals Grown by Slow Evaporation Method

2016 ◽  
Vol 675-676 ◽  
pp. 573-576 ◽  
Author(s):  
Pratya Thongpanit ◽  
Weerapong Chewpraditkul ◽  
Nakarin Pattanaboonmee
Keyword(s):  
Boric Acid ◽  
Temperature Stability ◽  
Hardness Measurement ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Slow Evaporation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Evaporation Method

Ammonium dihydrogen phosphate (ADP) crystals is very interesting due to its nonlinear optical property. This study investigated on improving of material for academic use by adding boric acid to modify ADP crystals. Slow evaporation method in aqueous solutions of pure ADP and ADP doped with three concentrations of H3BO3 as 0.1, 1.0, 5.0 %wt were studied. The grown crystals were confirmed tetragonal structure by powder X-ray diffraction studies. The FTIR spectrum analysis presented various functional groups of boron in three conditions of doped ADP. TGA study was comfirned the temperature stability at 220 °C for both pure and doped ADP crytals. The machanical stress was analyzed by Vicker’s hardness measurement. The results of this analysis showed boric acid doped 1.0 %wt had superior machanical stress from 10 to 75 grams. ADP doped with boric acid at 1.0 %wt was accepted in all test properties.

scholarly journals Crystal Chemistry of an Erythrite-Köttigite Solid Solution (Co3–xZnx) (AsO4)2·8H2O

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 548
Author(s):  
Justyna Ciesielczuk ◽  
Mateusz Dulski ◽  
Janusz Janeczek ◽  
Tomasz Krzykawski ◽  
Joachim Kusz ◽  
...  
Keyword(s):  
Solid Solution ◽  
Energy Dispersive Spectrometer ◽  
Substitutional Solid Solution ◽  
Relative Increase ◽  
Ore Deposit ◽  
X Ray ◽  
Sw Poland ◽  
Wide Compositional Range ◽  
Polymetallic Ore ◽  
Zn Ions

A wide compositional range, covering about 90% of an expected erythrite-köttigite substitutional solid solution with extreme compositions of (Co2.84Mg0.14Zn0.02) (AsO4)2·8H2O and (Zn2.74Co0.27) (AsO4)2·8H2O, was revealed in a suite of samples from a polymetallic ore deposit in Miedzianka, SW Poland. Members of the solid solution series were examined by means of Electron Probe Microanalysis (EPMA), Scanning Electron Microscopy (SEM)/Energy-Dispersive Spectrometer (EDS), X-ray single-crystal and powder diffraction, and Raman spectroscopy. Metal cations were randomly distributed between two special octahedral sites in the erythrite–köttigite structure. In response to Co ↔ Zn substitutions, small but significant changes in bond distances (particularly in [AsO4] tetrahedra), rotation, and distortion of co-ordination polyhedra were observed. Two sub-series of dominant cationic substitutions (Co-Mg-Ni and Co-Fe-Zn) were noted within the arsenate series of vivianite-group minerals linked by erythrite. The paragenetic sequence erythrite → Zn-rich erythrite → Co-rich köttigite → köttigite reflects the evolution of the solution’s pH towards increased acidity and a relative increase in the concentration of Zn ions following precipitation of erythrite.

Characterization of ammonium dihydrogen phosphate crystals for soft X-ray optics of the Beam Expander Testing X-ray facility (BEaTriX)

2019 ◽  
Vol 52 (3) ◽  
pp. 599-604 ◽  
Author(s):  
Claudio Ferrari ◽  
Sara Beretta ◽  
Bianca Salmaso ◽  
Giovanni Pareschi ◽  
Gianpiero Tagliaferri ◽  
...  
Keyword(s):  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Wide Beam ◽  
X Ray ◽  
Large Size ◽  
Beam Expander ◽  
New Type ◽  
Under Construction ◽  
Acceptance Tests

A new type of X-ray facility, the Beam Expander Testing X-ray facility (BEaTriX), has been designed and is now under construction at INAF–Osservatorio Astronomico di Brera (Merate, Italy) to perform the acceptance tests of the silicon pore optics modules of the ATHENA X-ray telescope. Crystals of high perfection and large dimensions are needed in order to obtain a wide beam (20 × 6 cm) with an X-ray divergence of <0.5′′ and an X-ray energy purity ΔE/E < 10−5. To generate X-ray diffracted beams at an X-ray energy of 1.49 keV, ammonium dihydrogen phosphate (ADP) crystals have been considered among other possible choices, because of their reported crystal quality and because they can be grown at sufficiently large size at a reasonable price. In the present paper, the results of the characterization of crystalline quality and lattice planarity of a 20 × 20 × 2 mm ADP sample are reported.

Preparation of Hierarchical CuO Nanoparticles and their Photocatalytic Activity

2013 ◽  
Vol 785-786 ◽  
pp. 378-381
Author(s):  
Li Min Wang ◽  
Hong Ming Sun ◽  
Zhong Chao Ma ◽  
Ao Xuan Wang
Keyword(s):  
Cuo Nanoparticles ◽  
Formation Mechanisms ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
One Pot ◽  
Hierarchical Nanostructures ◽  
X Ray ◽  
Morphology And Structure ◽  
Scanning Electron

The uniform hierarchical and microspheric copper oxide (CuO) nanostructures, which have been successfully prepared via a simple one-pot method. The detailed morphology and structure of the synthesized hierarchical and microspheric nanostructures were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) and UVvisible spectroscopy. The morphology of CuO particles depends on the ammonium dihydrogen phosphate (ADP) used in the synthesis, the formation mechanisms were proposed based on the experimental results. The catalytic activity of as-synthesized CuO was demonstrated by catalytic oxidation of methylene blue in the presence of hydrogen peroxide (H2O2) and CuO with hierarchical nanostructures was found to be the best catalyst.

Preparation and characterization of a novel solid solution of aluminum in tungsten carbide by mechanically activated high-temperature reaction

2006 ◽  
Vol 21 (7) ◽  
pp. 1700-1703 ◽  
Author(s):  
Junmin Yan ◽  
Xianfeng Ma ◽  
Wei Zhao ◽  
Huaguo Tang ◽  
Changjun Zhu ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Substitutional Solid Solution ◽  
Phase Identification ◽  
Temperature Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
High Temperature Reaction

In this work, a novel substitutional solid solution (W0.8Al0.2)C was synthesized by mechanically activated high-temperature reaction. X-ray diffraction was used for phase identification during the whole reaction process. Environment scanning electronic microscopy–field emission gun and energy dispersive x-ray were used to investigate the microstructure and the quantitative material composition of the specimen. (W0.8Al0.2)C was found to crystallize in the WC-type, and the cell parameters were a = 2.907(1) Å and c = 2.837(1) Å. The hardness of (W0.8Al0.2)C was tested to be 19.3 ± 1 GPa, and the density was 13.19 ± 0.05 g cm−3.

Influence of Composition and Isothermal Sintering on the Properties of Hydroxyapatite Bioceramic Bodies

2014 ◽  
Vol 979 ◽  
pp. 347-350
Author(s):  
Rungsarit Koonawoot ◽  
Cherdsak Saelee ◽  
Sakdiphon Thiensem ◽  
Sittiporn Punyanitya
Keyword(s):  
High Efficiency ◽  
Bending Strength ◽  
Strength Properties ◽  
Raw Material ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Mass Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

This work reports the influence of chemical composition and sintering schedule on the properties of sintered bodies of hydroxyapatite (HA) bioceramic. The method of preparing sintered bodies by solid state reaction and uniaxial pressing. The raw material used calcium carbonate (CaCO3) and ammonium dihydrogen phosphate (NH4H2PO4) powder as precursors. These powders were mixed at CaCO3: NH4H2PO4 mass ratio of 1:0.697, 1:0.692, 1:0.689, 1:0.685 and 1:0.68, respectively. The compositions in the temperatures range of 800-1300 °C for 3 hour. The sintered bodies were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR). Properties including phase, microstructures, porosity and bending strength of the samples. The results show that green bodies can be sintered at 1150 °C for 3 hours. This temperature found that crystals growth, highest of HA phase content in sintered bodies, good density and high efficiency strength properties.

Tungusite: new data, relationship with gyrolite and structural model

1995 ◽  
Vol 59 (396) ◽  
pp. 535-543 ◽  
Author(s):  
Giovanni Ferraris ◽  
Alessandro Pavese ◽  
Svetlana V. Soboleva
Keyword(s):  
Solid Solution ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Structural Model ◽  
Substitutional Solid Solution ◽  
Chemical Analyses ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Tetrahedral Layer ◽  
The Ideal

AbstractNew chemical analyses, electron and X-ray powder diffraction data, and comparison with gyrolite and reyerite show that tungusite has the ideal formula , symmetry P and a = 9.714(9), b = 9.721(9), c = 22.09(3), α = 90.13(1)°, β = 98.3(2)°, γ = 120.0(1)°, Z = 1. A structural model for tungusite is derived by splitting the double tetrahedral layer of reyerite and inserting a trioctahedral X sheet which is ideally occupied by Fe2+. Polytypism phenomena due to different relative positions between tetrahedral and X sheets are discussed. A substitutional solid solution represented by the formula [Ca14(OH)8]Si24−yAlyO60[NaxM9−(x+z)□z(OH)14−(x+y+2z)·(x+y+2z)H2O] includes tungusite (x = y = z = 0, M = Fe2+ and gyrolite (x = 1, y = 1, z = 6, M = Ca).

Phase stability analysis of shocked ammonium dihydrogen phosphate by X-ray and Raman scattering studies

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sivakumar Aswathappa ◽  
Arumugam Saranraj ◽  
Sahaya Jude Dhas Sathiyadhas ◽  
Kondaviti Showrilu ◽  
Martin Britto Dhas Sathiyadhas Amalapushpa
Keyword(s):  
Shock Wave ◽  
Degree Of Crystallinity ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Electron Microscopic ◽  
X Ray ◽  
Present Context ◽  
Adp Crystal ◽  
Wave Induced ◽  
The Impact

AbstractImpact of shock waves on non-linear optical materials bring about a lot of unknown behaviors of materials and such kinds of shock wave recovery experiments are highly required for the better understanding of material-property relationship. In the present context, we have performed experiments on the impact of structural properties of ammonium dihydrogen phosphate (ADP) samples under shock wave loaded conditions and the results of the test samples have been evaluated by X-ray diffraction (XRD), Raman spectroscopy, diffused reflectance spectroscopy (DRS) and field emission scanning electron microscopic (FESEM) technique. Interestingly, prismatic face of ADP shows loss of degree of crystallinity whereas pyramidal face shows enhancement of crystalline nature with respect to number of shock pulses due to shock wave induced dynamic re-crystallization. Hence, the present problem is worthy enough to unearth and understand the anisotropic nature of the ADP crystal and their structural modifications at shock wave loaded conditions.

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